#!/usr/bin/env python
# coding=utf-8

from Crypto import Random
from Crypto.Cipher import AES 
import base64

BS=16
pad=lambda s:s +(BS - len(s)%BS) *chr(BS -len(s) %BS )
unpad = lambda s: s[0:-ord(s[-1])]
KEY = "1234456twedfdsgf"


def encrypt(raw):
    raw=pad(raw)
    iv = Random.new().read(AES.block_size)
    cipher=AES.new(KEY,AES.MODE_CBC,iv)
    return base64.b64encode(iv+cipher.encrypt(raw))

def decrypt(enc):
    enc=base64.b64decode(enc)
    iv=enc[:16]
    cipher=AES.new(KEY,AES.MODE_CBC,iv)
    return unpad(cipher.decrypt(enc[16:]))



